Bug #4479: Psych fails to parse timestamps which is parsable by Syck

• Status: Third Party's Issue
• Assignee: tenderlovemaking (Aaron Patterson)
• Target version: -
• ruby -v: ruby 1.9.3dev (2011-03-08 trunk 31054) [x86_64-darwin10.6.0]

[sakuro (Sakuro OZAWA)]

=begin
$ irb -f -ryaml -rpsych --prompt simple

RUBY_DESCRIPTION
=> "ruby 1.9.3dev (2011-03-08 trunk 31054) [x86_64-darwin10.6.0]"
YAML::ENGINE.yamler = 'syck'
=> "syck"
YAML.load('{created_at: 2011-03-04T15:58:25Z}')
=> {"created_at"=>2011-03-04 15:58:25 UTC}
YAML::ENGINE.yamler = 'psych'
=> "psych"
YAML.load('{created_at: 2011-03-04T15:58:25Z}')
Psych::SyntaxError: (): couldn't parse YAML at line 0 column 26
from /usr/local/lib/ruby/1.9.1/psych.rb:154:in parse' from /usr/local/lib/ruby/1.9.1/psych.rb:154:in parse_stream'
from /usr/local/lib/ruby/1.9.1/psych.rb:125:in parse' from /usr/local/lib/ruby/1.9.1/psych.rb:112:in load'
from (irb):5
from /usr/local/bin/irb:12:in `'

I encountered this in ActiveSupport::JSON::Backends::Yaml.decode fed a JSON sent to a Rails app from Ext.js 4's RestProxy.

=end

[sakuro (Sakuro OZAWA)]

=begin
Reformat...

$ irb -f -ryaml -rpsych --prompt simple

RUBY_DESCRIPTION
=> "ruby 1.9.3dev (2011-03-08 trunk 31054) [x86_64-darwin10.6.0]"
YAML::ENGINE.yamler = 'syck'
=> "syck"
YAML.load('{created_at: 2011-03-04T15:58:25Z}')
=> {"created_at"=>2011-03-04 15:58:25 UTC}
YAML::ENGINE.yamler = 'psych'
=> "psych"
YAML.load('{created_at: 2011-03-04T15:58:25Z}')
Psych::SyntaxError: (): couldn't parse YAML at line 0 column 26
from /usr/local/lib/ruby/1.9.1/psych.rb:154:in parse' from /usr/local/lib/ruby/1.9.1/psych.rb:154:in parse_stream'
from /usr/local/lib/ruby/1.9.1/psych.rb:125:in parse' from /usr/local/lib/ruby/1.9.1/psych.rb:112:in load'
from (irb):5
from /usr/local/bin/irb:12:in `'

I encountered this in ActiveSupport::JSON::Backends::Yaml.decode fed a JSON sent to a Rails app from Ext.js 4's RestProxy.

=end

[sakuro (Sakuro OZAWA)]

=begin
libyaml version 0.1.3 (MacPorts)

=end

[tenderlovemaking (Aaron Patterson)]

• Status changed from Open to Third Party's Issue
• Assignee set to tenderlovemaking (Aaron Patterson)

=begin
This is due to ambiguities in the YAML spec and is expressly not supported by libyaml.

Please see the discussion here:

http://sourceforge.net/mailarchive/forum.php?thread_name=AANLkTi%3DtRBNOo__zmn%3D%3D3hW_VhQQNG1WeD5E-1z6ZAKm%40mail.gmail.com&forum_name=yaml-core

and here:

http://pyyaml.org/wiki/YAMLColonInFlowContext

=end